[client] app: delay showing the escape help for 250ms

This change prevents the help text being shown unless the escape key has
been held for a minimum of 250ms (reduced from 500ms).

client/include/app.h

@@ -54,6 +54,7 @@ void app_handleKeyRelease(int scancode);
 void app_handleEnterEvent(bool entered);
 void app_handleFocusEvent(bool focused);
 void app_handleCloseEvent(void);
+void app_handleRenderEvent(const uint64_t timeUs);
 
 void app_setFullscreen(bool fs);
 bool app_getFullscreen(void);

client/src/app.c

@@ -196,7 +196,6 @@ void app_handleKeyPress(int sc)
     g_state.escapeActive = true;
     g_state.escapeTime   = microtime();
     g_state.escapeAction = -1;
-    app_showHelp(true);
     return;
   }
 
@@ -234,7 +233,7 @@ void app_handleKeyRelease(int sc)
   {
     if (g_state.escapeAction == -1)
     {
-      if (microtime() - g_state.escapeTime < 500000 && g_params.useSpiceInput)
+      if (!g_state.escapeHelp && g_params.useSpiceInput)
         core_setGrab(!g_cursor.grab);
     }
     else
@@ -248,10 +247,7 @@ void app_handleKeyRelease(int sc)
     }
 
     if (sc == g_params.escapeKey)
-    {
       g_state.escapeActive = false;
-      app_showHelp(false);
-    }
   }
 
   if (!core_inputEnabled())
@@ -386,6 +382,26 @@ void app_handleCloseEvent(void)
     g_state.state = APP_STATE_SHUTDOWN;
 }
 
+void app_handleRenderEvent(const uint64_t timeUs)
+{
+  if (!g_state.escapeActive)
+  {
+    if (g_state.escapeHelp)
+    {
+      g_state.escapeHelp = false;
+      app_showHelp(false);
+    }
+  }
+  else
+  {
+    if (!g_state.escapeHelp && timeUs - g_state.escapeTime > 200000)
+    {
+      g_state.escapeHelp = true;
+      app_showHelp(true);
+    }
+  }
+}
+
 void app_setFullscreen(bool fs)
 {
   g_state.ds->setFullscreen(fs);

client/src/main.c

@@ -157,7 +157,8 @@ static int renderThread(void * unused)
       }
     }
 
-    if (!g_state.resizeDone && g_state.resizeTimeout < microtime())
+    const uint64_t now = microtime();
+    if (!g_state.resizeDone && g_state.resizeTimeout < now)
     {
       g_state.ds->setWindowSize(
         g_state.dstRect.w,
@@ -165,6 +166,8 @@ static int renderThread(void * unused)
       );
       g_state.resizeDone = true;
     }
+
+    app_handleRenderEvent(now);
   }
 
   g_state.state = APP_STATE_SHUTDOWN;

client/src/main.h

@@ -51,6 +51,7 @@ struct AppState
   bool                 escapeActive;
   uint64_t             escapeTime;
   int                  escapeAction;
+  bool                 escapeHelp;
   KeybindHandle        bindings[KEY_MAX];
   const char *         keyDescription[KEY_MAX];
   bool                 keyDown[KEY_MAX];